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What does the typical Guzzi 1100cc "lump" weigh and what does a typical Harley 1200 Sportster engine weigh? I guess that question should include the transmission as well but not the rest of the drivetrain. I'm just curious as to why neither marque has a reasonably light large displacement bike and I'm guessing that the frame constitutes quite a bit of the dry weight.
Still, in 1957, The updated K-model was renamed Sportster for a reason.It was a pretty sporty bike in its day. No pretensions needed. An XLCH was considered a hot bike from its intro in 1958, until the CB750 showed up a decade later...
That last is one part I don't understand. What is driving "low seat heights", "short chassis", and "forward weight distribution"? Those aren't necessarily good things, and aren't necessarily performance enhancers. They're just styling issues ... hang onto ANY of your old clothes long enough, and they come back into style. Maybe "next day", those things will change .... ???Lannis
Since the 30's, every truly great handling, sporting mototcycle has been right around 400 lbs and had a 55 inch wheelbase. Shorter than 55 inches is too twitchy and longer than 55 requires steeper steering geometry which is also too twitchy. It doesn't matter if you're talking a BSA Goldstar, a Ducati 851 or a 2011 CBR1000RR, they all have a wheelbase right around 55 inches and weigh close to 400lbs. To make a motorcycle turn fast, the weight needs to be pushed toward the front wheel. It also helps if it's got a low polar moment. The traditional Guzzi has neither. The shaft drive also further screws up the weight bias. Around town or on a commuter-tourer a 50/50 weight bias is great. On a sportbike it's usually more like 60/40 front to rear. Modern bikes have longer swingarms to help hook up. If you put a long swingarm on a Guzzi you end up with a 60 inch wheelbase like the Griso, Norge and Breva's CARC. You can build a 55 inch wheelbase with an L twin or a parallel twin or inline 4 or singles or V twins and still have a normal riding position that doesn't put your ass over the rear wheel. That isn't as easy to do on a Guzzi twin because your knees hit the cylinders unless you're riding an MGS-01 with rearsets that are as cruel as a GSX-R. Some of the latter points concerning weight bias and long swingarms could be construed as "fashion" but the 400lb/55 inch wheelbase isn't. I may be crazy but it's my "golden rule" for winnowing great handling bikes from good ones.It's why Harley has never made a truly great handling bike with any sporting pretense and why British bikes wiped the floor with the world for decades before the Japanese and Italians figured it out. Just my .02
60 inches?Imola 1972, 750 production race (i.e. street bikes), Ducati 1st and 2nd with ~ 60 inch wheelbases. The Japanese, MV and the British couldn't keep up. That lasted through about 1978 and included winning Daytona. The optimum wheelbase has varied depending on the ratio of power to chassis technology at a given time. In 1972 they had more power than chassis, so 60 inches and a relatively good chassis worked better for going fast than anything shorter. Since then its been getting shorter again.The "icons" of street bike handling over time include the 1970s Ducati SS's, all of which had over 60 inch wheelbase.
290 lbs, 52 inch wheelbase. The icon of handling at the other end of the spectrum from the 1970's Ducati handling icon. There are no rules, just changing circumstances.
Every rule has exceptions. That doesn't make the rule less valid.
A 70's Ducati SS is a very stable motorcycle. Compared to a spindly framed Japanese bike of the day they were wonderful but I would still say a Bonneville or properly shimmed Commando handled better on a curvy road. The racing Ducati's of the early 70's used a variation of a Seeley chassis and they didn't have 60" wheelbases.
It does kind of fit that a guy who rides a 1200 Breva would think that anything interesting and different is worse by definition. The Ducati 750 GT was by far the best handling street bike of its time, and won Imola. About 61 inch wheelbase. Exceptions are the rule, and there's more than one way to solve a complex problem within the bounds of current technology. These are motorcycles using an ever changing mix of technology, not Greek temples.In the 50s the optimum setup was the Manx Norton (and the street bikes that used its feather bed frame), and that's when this particular theory started. The story was that all bikes had to replicate the feather bed Nortons or they could not handle. 28 degrees rake was often included too, as well as 400 lbs and 55 inch wheelbase.
A Ducati GT750 is a fricken pig that won't turn. They weighed 500lbs and were too long.
Quote from: JohninVT` on February 03, 2011, 07:21:36 PMA 70's Ducati SS is a very stable motorcycle. Compared to a spindly framed Japanese bike of the day they were wonderful but I would still say a Bonneville or properly shimmed Commando handled better on a curvy road. The racing Ducati's of the early 70's used a variation of a Seeley chassis and they didn't have 60" wheelbases.I owned a Norton Commando for several years, have spent several full days riding a late-model ('78) Bonneville on twisty roads, and currently own a bevel 900SS (actually for the last 18 years). Let me assure you that any comparison is totally ridiculous: you're comparing '70s race bike handling with '40s-level street bike handing. Ducati hired Colin Seeley to build one chassis for a 500GP bike that used a unique prototype engine. They used some of its features for their own chassis (chain adjusters for instance), but they ALL had 60 inch wheelbases, including the race bikes.
Quote from: Pescara on February 03, 2011, 08:18:32 PMQuote from: JohninVT` on February 03, 2011, 07:21:36 PMA 70's Ducati SS is a very stable motorcycle. Compared to a spindly framed Japanese bike of the day they were wonderful but I would still say a Bonneville or properly shimmed Commando handled better on a curvy road. The racing Ducati's of the early 70's used a variation of a Seeley chassis and they didn't have 60" wheelbases.I owned a Norton Commando for several years, have spent several full days riding a late-model ('78) Bonneville on twisty roads, and currently own a bevel 900SS (actually for the last 18 years). Let me assure you that any comparison is totally ridiculous: you're comparing '70s race bike handling with '40s-level street bike handing. Ducati hired Colin Seeley to build one chassis for a 500GP bike that used a unique prototype engine. They used some of its features for their own chassis (chain adjusters for instance), but they ALL had 60 inch wheelbases, including the race bikes. I owned a Commando Interstate for ten years. I have owned a BSA Super Rocket for 20 years and my father owned it for 20 years before that. I've owned at least 5 Bonneville's. I doubt you could assure me of anything other than your snobbery. The Brit stuff weighed a hundred pounds less and handled better on rough, curvy roads. It may be that you live where the roads are smooth and the curves are sweeping. Why you would say the Ducati had 70's racebike handling and the Brits were 40's streetbike handling when they used similar components and the main difference was frame geometry is a little baffling. Chain adjusters? Really? That's all they used from the Seeley frame? ::) Whatever, man. I'm all set with you tonight. You're like a 12 year old.
Quote from: steffen on February 01, 2011, 07:23:44 AMHi Greg.Good to have you back on WG.I do really appreciate your point of view and agree that Guzzi need something new to pay the bills (a diesel, electric, I dunno...)Now, would you please care to clarify some things for me, that I don't quite get:How come that guzzi is a failure compared to other iconic aircooled engines: The Harley, BMW boxer and Ducati L-twin (you can even throw the Triumph twin in, if you like).You once stated, that Piaggio needs to learn the motorcycle business. What do the other brands do right, that Piaggio doesn't?I think that the Guzzis are getting there in terms of performance. Now they just need to shed 100 lbs ;D/Steffen, DenmarkThanks. It's enjoyable to check in once in a while.Why is Guzzi a failure compared to those other twins? It's a huge subject that would take many pages to do minimal justice, but here's a distillation to 200 proof in one paragraph: The Guzzi transverse-V twin isn't, or wasn't, anyway, a failure. As an engine, it was simple, robust, reliable, durable, and easy to maintain. It cooled extremely well. It had great torque and decent horsepower. And it had character. Unfortunately, though, its architecture greatly compromised proper design of the rest of the motorcycle because the jugs were in the way of designing the rest of the bike for optimal rider comfort and weight distribution. The jugs are not in the way on the Harley, Ducati, and Triumph, and other engines. It is less true for the BMW engine. I know this reason doesn't resonate here and it would take many pages and diagrams to adequately explain it. If you want to understand it, put your own body on your Guzzi and picture moving yourself forward or lowering the seat height, and you might get a better idea of what a challenge it becomes and why the Guzzi engine has become a handicap in this day of low seat heights, short chassis, and forward weight distribution. Water-cooling the transverse-V engine will only make this trait worse. It's why I believe it folly to think such an engine will reverse Guzzi's fortunes. It's just my opinion, though.The motorcycle business. Another huge subject. I'll try to get to this and the rest later.
Hi Greg.Good to have you back on WG.I do really appreciate your point of view and agree that Guzzi need something new to pay the bills (a diesel, electric, I dunno...)Now, would you please care to clarify some things for me, that I don't quite get:How come that guzzi is a failure compared to other iconic aircooled engines: The Harley, BMW boxer and Ducati L-twin (you can even throw the Triumph twin in, if you like).You once stated, that Piaggio needs to learn the motorcycle business. What do the other brands do right, that Piaggio doesn't?I think that the Guzzis are getting there in terms of performance. Now they just need to shed 100 lbs ;D/Steffen, Denmark
This attitude is seem occasionally. 3 or four of my colleagues ride or has ridden bikes, from Aprilia, Ducati, HD to BMW. My BMW colleague was giving me a friendly scorn asking if I were packing enough tools to ride my goose around for more than 25km. He's 56 and packs around 160hp on his BMW 1000RR - good for him, my Lario 60hp will do, but I'll bet my hiney that he would love the Griso or the Daytona 1000 if he would ever consider riding one.What seem a common denominator is, that they have never ever ridden a goose, they have an opinion based on hearsay.SteffenWHY wouldn't your friend consider a goose - embarrassment ???He liked the ride....Ciao
Funny they didn't say anything about this old lump of a motor sucks to much for them to like it! Ok... I wanted to get back on topic. It seems possible (as I stated several times before in this post) that people won't purchase because of Guzzi's business model (or lack thereof). I haven't heard a first ride report that stated these engines just don't cut it. I continue on my rant about the lack of dealerships, parts, advertising, and all the other BS that needs fixing well before this engine. Again... if people don't know about this engine... :P-Kevin
They should just put this prototype from 1950 into production:That flywheel might not pass but that is a minor detail...... 8)